MLP/Undertale crossover.
Not a PWNY-verse story.

Long ago, the Monsters and Humans fought a great war. The Monsters lost, and were sealed in the Underground. It would take the power of seven human souls to break the barrier that kept them imprisoned. They only had six. And so the Monsters waited and hoped, praying that another human would find their way to the Underground. Some thought the seventh soul would give their King the strength to break the barrier. Some dreamed of a human who would be their friend, and save them all...or had nightmares of one who would bring back the war.

...but nobody came.

...but somepony did.

Eons after the war, with no way to tell how much time had passed above, a tiny blue filly with wings and horn fell into the underground, calling for her Mama. None knew the poor creature's nature or origins...but her soul was powerful with magic, even more so than a human soul.

None can know what will come...of this little 'Woona'.

Cover art by Sanyo21

Celestia had a vision, of two beings, one of darkness, one of light. They claimed that they would reclaim Equestria and return it to dust. The next day, a small creature appears, frightened, scared, and afraid of her very touch. A child. A child who may herald the end, or save Equestia from its demise.

Isaac has been in the basement as long as he can remember. So many times has he descended through this purgatory of death and murder, god and demons, so many things that hurt, burned and killed.
Then one day it stopped. A secret room that opened the chest he had known so long, and he was free. He could leave the Basement.
He didn't see anything else that followed him out.
He didn't expect the world to have changed so much in his absence.
And he never could've imagined they'd all be ponies.

And ponies never imagined that simple children could ever save them from the forces of evil.

Holy Hell! This got featured! (1/8/16)

A-again? Thank you! (1/22/16)

IAmNotSmartest.omfg has stopped responding. Close the program? (2/12/16) >No >Hell no >Back the %#$@ off

IT JUST KEEPS HAPPENING I DON'T UNDERSTAND. (3/22/16)

And again? I though Friday the 13th was supposed to be an unlucky day! (5/13/16)

*Incoherent stuttering* (5/30/16)

Character list will be updated as necessary, those not immediately listed are:
- King Sombra
- Twilight
- Spike
- TBC

Characters from the Binding of Isaac are under Other, as you'd expect.
Correct me if I get an item's effect or description wrong!
Correct me if I get grammar or spelling incorrect, I'll fix them as I'm aware of them!

Cover art is by me.

Huge thank you to TrueGentleman, who has taken it upon him to aid me in the editing of this story! (Stopped as of 18 onward)

Appreciation for HydraLightning, proofreader from CH3+.

And a special thanks to awesomesauce4 for inspiring me to start on this! Here's their story!
|The Unbinding|

Sunset Shimmer has recently been reformed from her disaster during the Fall Formal. In her desire to direct her ambition for something worthwhile, she wants to learn an instrument.

Well....She heard one guitar....

Coverart

(Warning: contains a lot of classic rock)

I don’t know if I’ve truly died or lost my mind. What is reality, what is sanity? Are they not just a product of society, a unit to be measured? Something that can be judged, evaluated, and constricted by belief, but also something that is limited by our very biology? I’m not really sure, yet I believe myself to be sane, and have decided to embrace my own reality. One born purely from thought, bound by the limitations of my imagination. This… is a tale of ”my” reality, my triumphs, my mistakes, and the sins of a father.

Desert Mirage lives in a world full of guns, lasers, explosives and people competing to be the best of the best. There she excels at what she does: hunting. She started as a nobody, and yet became one of the most sought-after gunslingers.

Sunset Shimmer was practically born the best of the best. Selected by none other than Princess Celestia to be her prized student... until she ran away to another world in search of power. Through trials and suffering she was eventually taught humility and friendship.

At first blush, they don't have much in common. But their connection runs deep, and sooner or later it will change their worlds forever.

It has been two years since the human TD ascended to become Princess Antares, and he is settling into his role as one of the rulers of Equestria quite nicely. His loyal guard is strong, his palace is awe-inspiring, and he is beloved and worshiped by ponies everywhere. However, when the Element of Magic is stolen by an old student of Celestia's and taken through a magic mirror while he is visiting the Crystal Empire with the Mane Six, he discovers that another world has been very close by during his whole reign. A rather familiar world at that. Deciding that he is the best pony for the job, he takes his two best soldiers through the portal with him to get the Element back. So, pretending to be a foreign exchange student from Canada, he infiltrates of all things... a high school.

He is less than pleased.

Buy a print copy of the original here!

Edited by the magnificent Strike89

Cover art by the perpetually awesome SoaringSketches

Princess Luna still feels alone, nineteen years after her return to Equestria . But when she finds a friend in an online game, everything seems better. She can be herself without worrying about what others think, and she can finally talk to another pony, even if he never knows who she really is.

Celestia is worried about her sister, especially right now. Upcoming peace talks with a powerful new nation mean that all the Princesses need to be completely ready. With her Luna so absorbed in a fantasy world, she wonders how she'll make it through the harrowing weeks to come.

Button Mash feels like a failure. He's still living at home, he still can't find work that can use his degree from the university, and he still feels alone. His friends are getting married, starting families, and thriving in their careers. On the plus side, he plays games regularly, and his best friend is a mare, even if she doesn't know his name. He hopes that his upcoming vacation to Canterlot might help his mindset.

But, unbeknownst to all of them, a sinister web within a dark plot threatens to ensnare Equestria... And Luna may be the only one able to stop it.

She may face it alone, or maybe she'll have some help from her knight in faded armor...

Cover art credit to yamashta. Link here.

Preread by -TGM- and Goldenwing

Edited by m1ntf4n, PheonixStarr, Wing, and the_Doc, and Swan Song, and Orion Caelum.

Follows canon up to about season 4 or so. I'm not sure when everything went off the rails, but it was originally as true as possible when initially written.

Link to the Discord chat HERE!

I'm going to start off by saying: F*** Sweat Goblins. They're rude, they're loud, they break into you lab and touch things without asking, and they teleport you to alien worlds right as you're about to get your engineering career going. But, most of all, they sweat a lot, and that's just gross.

Thanks to one of these foul little things, I have now been hurled into some place called Equestria, that's inhabited by Pastel colored ponies and is completely devoid of any modern technology.

Oh, and I'm a robot now. Why? I don't know, ask the Sweat Goblin that sent me here.

Princess Twilight Sparkle lay there in anguished silence for almost a minute until she decided to let Scootaloo, Apple Bloom, and me help her. It came out as a whisper: "My special talent isn't magic." Of all the ponies we might help, I had never imagined our first might be Twilight, or that it would essential for Equestria that we got it right.

Featured (as high as #2) from Oct 18th through Oct 22nd 2015 for 100 hours.
Thank you everypony!

A clerical error in the Registry of Mortals sends an unwitting human to a strange land. It wouldn't be so bad, if the ponies there weren't out for his blood.

Literally.

A little twist on the myth that unicorns were hunted for their fantastical powers.